666748008 has 48 divisors (see below), whose sum is σ = 1811047680. Its totient is φ = 221600544.

The previous prime is 666747953. The next prime is 666748013. The reversal of 666748008 is 800847666.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11641 + ... + 38327.

It is an arithmetic number, because the mean of its divisors is an integer number (37730160).

Almost surely, 2^666748008 is an apocalyptic number.

It is an amenable number.

666748008 is an abundant number, since it is smaller than the sum of its proper divisors (1144299672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666748008 is a wasteful number, since it uses less digits than its factorization.

666748008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27046 (or 27039 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 666748008 is about 25821.4640948185. The cubic root of 666748008 is about 873.6159923913.

The spelling of 666748008 in words is "six hundred sixty-six million, seven hundred forty-eight thousand, eight".